Tatiana A.S. Webb 
Each Separate Dying Ember [EPUB ebook] 

In a world where humanity bear wings and racial tension divides a city, things are… Complicated. Daneel just wants her family safe but was never meant to be the one protecting them; Jedekiah is busy trying to burn out the voices in his head while his home is falling apart; and North isn»t even sure what»s happening, but he»s pretty certain it won»t end in diplomacy. But after an unfortunate ‘accident’ throws these three unlikely — and unwilling — allies out of their comfort zones and into each others» worlds, they are going to have to learn very quickly the meaning of teamwork and cooperation, to ensure their survival through the city»s notorious Disciplines, a (usually) optional gladatorial tournament. Victory will involve breaking boundaries, breaking bones, and occasionally breaking North»s glasses — but the stakes might be higher than any of them realise. It»s more than just their wings that they»re fighting for.